Question

2. The structure of a mycelium network is a marvel of natural engineering. Unlike the linear root systems of many plants, mycelium grows in a non-linear, branching pattern that allows it to maximize surface area contact with the soil. This high surface-to-volume ratio is not merely a design quirk; it is a functional necessity. It allows the fungi to absorb minerals like phosphorus and nitrogen with high efficiency, which they then "trade" with trees in exchange for the carbon-rich sugars the trees produce through photosynthesis. This symbiotic relationship is the foundation of forest health.

3. Beyond simple nutrient exchange, the structure of these networks facilitates a form of primitive "messaging." When a tree is attacked by aphids or beetles, it releases chemical signals into the mycelium. These signals travel through the fungal threads to neighboring trees, which then begin producing defensive enzymes to ward off the impending threat. Consequently, the forest acts less like a collection of individuals and more like a single, coordinated organism.

4. However, this structure is currently under threat from human intervention. Soil compaction from heavy machinery and the use of broad-spectrum fungicides disrupt the delicate hyphal threads. When the mycelium is severed, the "communication" stops. Trees become isolated, leading to a measurable decline in the ecosystem's resilience. Understanding the central role of this hidden architecture is no longer just a matter of botanical curiosity; it is a requirement for modern conservation efforts.

How does the author develop the transition from Paragraph 2 to Paragraph 3?


By shifting from a description of physical nutrient exchange to an explanation of chemical signaling.


By comparing the mycelium of a forest to the internet infrastructure of a city.


By providing a chronological history of how fungal networks were first discovered.


By moving from a "problem" (nutrient deficiency) to a "solution" (human intervention).

Question at position 4
What is the most likely result of soil compaction as described in Paragraph 4?


Trees will produce more sugar to compensate for the lack of minerals.


The forest's ability to coordinate a defense against pests will be compromised.


Mycelium will grow more linear root systems to bypass the compacted soil.


The fungi will begin to compete with the trees for sunlight.

Answer 1

1) By shifting from a description of physical nutrient exchange to an explanation of chemical signaling.

2) The forest's ability to coordinate a defense against pests will be compromised.